Aggregation of poly(styrene)-poly(ethylene oxide) diblock copolymer monolayers at the air-water interface

被引:83
作者
da Silva, AMG [1 ]
Simoes Gamboa, AL
Martinho, JMG
机构
[1] Univ Tecn Lisboa, Ctr Quim Estrutural, Inst Super Tecn, Complexo I, P-1096 Lisbon, Portugal
[2] Univ Tecn Lisboa, Ctr Quim Fis Mol, Inst Super Tecn, P-1096 Lisbon, Portugal
关键词
D O I
10.1021/la980101z
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The effects of the concentration of the spreading solution, initial surface concentration of the monolayer, and maximum pressure reached on the compression run, rate of the compression-expansion cycles and number of successive cycles were studied. The influence of the polyethylene oxide length was further studied and showed that the minimum on the π-A isotherms for polystyrene (PS)-PEO disappears in the presence of various amounts of stearic acid. Dynamic light scattering measurements showed aggregation of the block copolymers PS38-PEO90 and PS38-PEO148 in chloroform solutions for the same range of concentrations used in the film balance measurements.
引用
收藏
页码:5327 / 5330
页数:4
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